Rain Billing Department be professional and respond to your customers

I have been having issues with the rain billing department for almost 2 Months now, The issues started on the 02 Feb 2021 when they where busy upgrading their systems and I could not connect to the internet from the 02 Feb until 18 Feb 2021 from the 19th services resumed as normal, but month end they billed me for the full month which I found it really unfair as I had to buy data from another service provider just to continue working as I am working from home. I need the billing department to credit my accounts they could have billed me for only half the amount I am paying the R479 as I didn't use their services and it was not my fault the fault was on their side. Why do I have to pay for services they didn't render to me. JJ Botha in the billing department requested all the ticket numbers, I logged since feb and I provided her with all the info and still no feedback. Rain Billing department get your ducks in a row and reimburse me for the services you didn't render to me.